Biodiversity and Conservation

According to Robert May, the global species diversity is about

• 50 million

• 7 million

• 1.5 million

• 20 million

Which of the following is not an example of in situ biodiversity conservation?

• Biosphere reserves

• National parks

• Wildlife sanctuaries

• Botanical gardens

Which of the following is not a cause for loss of biodiversity?

• Destruction of habitat

• Invasion by alien species

• Setting up of zoological parks

• Over-exploitation of natural resources

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Species diversity ______ as one moves from equator to pole.

• Increases

• Decreases

• first increases then decreases

• first decreases then increases

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The extinction of passenger pigeon was due to

• increased number of predatory birds

• over exploitation by humans

• non-availability of the food

• deforestation

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Which of the following statements is correct?

• Parthenium is an endemic species of our country.

• African catfish is not a threat to indigenous catfishes.

• Steller’s sea cow is an extinct animal.

• Lantana is popularly known as carrot grass

Which of the following is characterised by presence of less seasonal variations?

• Tropics

• Temperate

• Coniferous forests

• Deserts

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Rivet popper hypothesis was given by

• Paul Ehrlich

• Alexander von Humboldt

• David Tilman

• Charles Darwin

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Read the following statements and select the correct answers.

Statement I: Out of every 10 animals on this planet, 7 are insects.

Statements II: The number of fungi species in the world is more than the combined total of the species of fishes, amphibians, reptiles and mammals.

• Only statement I is incorrect

• Only statement II is incorrect

• Both the statements are incorrect

• Both the statements are correct

Tropical area has all the following characteristics, except

• More solar radiation available

• More constant and predictable environment

• Undergone frequent glaciations in the past

• Having greater species diversity

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